Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair value measurement
Securities, available-for-sale	$ 1,359,483	$ 1,364,734
US Government Agencies Debt Securities [Member]
Fair value measurement
Securities, available-for-sale	112,402	120,123
Mortgage Backed Securities - Residential
Fair value measurement
Securities, available-for-sale	623,667	626,428
Mortgage Backed Securities - Commercial
Fair value measurement
Securities, available-for-sale	11,444	15,671
Collateralized Mortgage Obligations
Fair value measurement
Securities, available-for-sale	201,976	175,005
State and Municipal Obligations
Fair value measurement
Securities, available-for-sale	364,955	380,098
Taxable Municipal Bonds
Fair value measurement
Securities, available-for-sale	35,697	38,626
US Treasury Securities
Fair value measurement
Securities, available-for-sale	2,076	204
Collateralized Debt Obligations
Fair value measurement
Securities, available-for-sale	3,531	3,359
Fair Value, Inputs, Level 1 [Member]
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] | US Government Agencies Debt Securities [Member]
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] | Mortgage Backed Securities - Residential
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] | Mortgage Backed Securities - Commercial
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Obligations
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] | State and Municipal Obligations
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] | Taxable Municipal Bonds
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] | US Treasury Securities
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 1 [Member] | Collateralized Debt Obligations
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 2 [Member]
Fair value measurement
Securities, available-for-sale	1,352,664	1,357,737
Derivative Assets	884	1,030
Derivative Liability	(884)	(1,030)
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]
Fair value measurement
Securities, available-for-sale	112,402	120,123
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities - Residential
Fair value measurement
Securities, available-for-sale	623,667	626,428
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities - Commercial
Fair value measurement
Securities, available-for-sale	11,444	15,671
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations
Fair value measurement
Securities, available-for-sale	201,976	175,005
Fair Value, Inputs, Level 2 [Member] | State and Municipal Obligations
Fair value measurement
Securities, available-for-sale	363,410	378,203
Fair Value, Inputs, Level 2 [Member] | Taxable Municipal Bonds
Fair value measurement
Securities, available-for-sale	35,697	38,626
Fair Value, Inputs, Level 2 [Member] | US Treasury Securities
Fair value measurement
Securities, available-for-sale	2,076	204
Fair Value, Inputs, Level 2 [Member] | Collateralized Debt Obligations
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member]
Fair value measurement
Securities, available-for-sale	6,819	6,997
Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities [Member]
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] | Mortgage Backed Securities - Residential
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] | Mortgage Backed Securities - Commercial
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Obligations
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] | State and Municipal Obligations
Fair value measurement
Securities, available-for-sale	1,545	1,895
Fair Value, Inputs, Level 3 [Member] | Taxable Municipal Bonds
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] | US Treasury Securities
Fair value measurement
Securities, available-for-sale	0	0
Fair Value, Inputs, Level 3 [Member] | Collateralized Debt Obligations
Fair value measurement
Securities, available-for-sale	$ 3,531	$ 3,359